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Comparative analysis on performance of PV direct-driven refrigeration system under two control methods.

Author(s) : GAO Y., JI J., HAN K., ZHANG F.

Type of article: IJR article

Summary

The concept of the PV direct-driven refrigeration system has been proposed to reduce the cost of the PV refrigeration system. In the PV direct-driven refrigeration system, the system control method has great impact on system performance. In this paper, a dynamic model of the PV direct-driven refrigeration system is proposed and validated with experimental results. This model contains a PV-compressor coupling model, which can reflect the relationship among solar irradiance, compressor load and compressor speed. Based on the model, two control methods for the PV direct-driven refrigeration system are compared, which are the maximum power point tracking (MPPT) method and the compressor speed prediction (CSP) method. According to the comparison results, the following conclusions can be summarized. Firstly, the MPPT method is more efficient than the CSP method. And the difference of two control methods can be reduced if the control model in CSP mode matches well with the system. Secondly, the drop of solar irradiance causes the decreases of daily operation time and total cooling capacity in both MPPT mode and CSP mode. Finally, the MPPT method is more adaptive to the variations of ambient temperature and water temperature.

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Pages: 13

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Details

  • Original title: Comparative analysis on performance of PV direct-driven refrigeration system under two control methods.
  • Record ID : 30028317
  • Languages: English
  • Subject: Technology, Developing country
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 127
  • Publication date: 2021/07
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2021.03.003

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